Sink strainer



FIG. 1 is a perspective view of a sink strainer showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a cross-sectional view thereof, taken along line 8-8 in FIG. 3. 

The ornamental design for a sink strainer, as shown and described. 